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Denitrification and Greenhouse Gas Dynamics in Lakes Receiving Atmospheric Nitrogen Deposition


Abstract The global transport and deposition of anthropogenic nitrogen (N) to downwind ecosystems are significant and continue to increase. Indeed, atmospheric deposition can be a significant source of N to many watersheds, including those in remote, unpopulated areas. Bacterial denitrification in lake sediments may ameliorate the effects of N loading by converting nitrate (NO3-) to N2 gas. Denitrification also produces nitrous oxide (N2O), a potent greenhouse gas. The ecological effects of atmospheric N inputs in terrestrial ecosystems and the pelagic zone of lakes have been well documented; however, similar research in lake sediments is lacking. This project investigates the effects N of deposition on denitrification and N2O production in lakes. A... (more)
Created Date 2010
Contributor Mccrackin, Michelle Lynn (Author) / Elser, James J (Advisor) / Grimm, Nancy B (Committee member) / Hall, Sharon J (Committee member) / Hartnett, Hilairy E (Committee member) / Souza, Valeria (Committee member) / Arizona State University (Publisher)
Subject Biology, Ecology / Biology, Limnology / Water Resource Management / denitrification / lake / nitrogen deposition / nitrous oxide / sediment
Type Doctoral Dissertation
Extent 288 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Ph.D. Biology 2010
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis